Half-elves in the Dungeons & Dragons (D&D) universe typically have a lifespan that is slightly longer than humans but shorter than elves. They can live up to 180 years, though this can vary depending on the specific setting and rules of the campaign. The half-elf's lifespan is also affected by other factors, such as their parents' lifespan and their level of physical activity. Half-elves are known for being more physically resilient than humans and more emotionally resilient than elves, so this can also affect their lifespan.